Window guard



Pt- 1956 v. P. POLOS WINDOW GUARD Filed June 10, 1954 Victor I? Po/osINVENTOR.

United States Patent WINDOW GUARD Victor P. Polos, Dallas, Tex.

Application June 10, -1954, Serial No. 435,814

1 Claim. (Cl. 292-288) The present invention relates to a guardattachment for window sashes to positively limit the opening movement ofone sash with respect to a second sash.

More particularly, the invention is' directed to a window constructionwherein a pair of sashes are mounted in offset, parallel planes with atleast one of the sashes being slidable relative to the other for openingand closing movement.

The primary object of the invention is to provide a guard for windowconstructions of the type set forth above which will positively limitthe opening movement of the movable sash to prevent housebreaking, theftor burglary.

A very important object of the invention is in the provision of a sashguard which is quickly and simply removable from the window to permitfull opening movement of the sashes with respect to one another if bothare movable, or to permit full opening movement of the movable sash ifonly one is movable.

Another important object of the invention is in the provision of a guardattachment which provides a novel, unyielding structure capable ofwithstanding great force without buckling and which is exceedinglyeconomical of manufacture and which necessitates a minimum of skill inits application.

These together with other objects and advantages which will becomesubsequently apparent reside in the details of construction andoperation as more fully hereinafter described and claimed, referencebeing had to the accompanying drawings forming a part hereof, whereinlike numerals refer to like parts throughout, and in which:

Figure 1 is a side elevational view in cross-section of a windowconstruction with the sash guard mounted on the sash in its operativeposition;

Figure 2 is an enlarged, front elevational detail view of the sash guardsetting forth the manner in which it is mounted on the sash;

Figure 3 is an enlarged front elevational detail view of the mountingplate constituting a portion of the sash guard mounted on the sash;

Figure 4 is a cross-sectional view taken substantially along the planeof section line 4-4 of Figure 3;

Figure 5 is a front perspective view of the striker plate constituting aportion of the sash guard; and

Figure 6 is a rear perspective view of the striker plate.

In Figure 1 is shown in cross-section the side elevational view of awindow frame construction 10 including a window frame 12 having a windowsill 14. Within the frame 12 are vertically slidably mounted, invertically offset parallel planes, upper and lower sashes 16 and 18,respectively.

The sashes 16 and 18 are substantially rectangular in shape, eachincluding top member 20, side members 22 and bottom member 24.

The guard attachment constituting the present invention is secured toone of the side members 22 of the upper sash 16 intermediate the top andbottom thereof, and is designated in its entirety by the numeral 26.

The guard attachment comprises two members, a

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mounting plate 28 secured to the side member 22 of the upper sash 16 anda striker plate 30 removably attached to the mounting plate 28 forstriking the top member 20 of the lower sash 18 when the lower sash israised to opening position of predetermined amount to limit furtheropening movement thereof.

In mounting the mounting plate 28, the side member 22 of the upper sash16 upon which this plate is mounted is provided with a recessed portion32. The mounting plate 28 is mounted on the sash member 22 in coveringrelation to the recessed portion 32, being provided with a keyhole slot34 opening into the recessed portion 32. Suitable fastening elements 36secure the mounting plate in place on the side member 22.

The striker plate 30 consists of an L-shaped member having first andsecond flat, right angularly related legs 38 and 40, respectively.

Projecting from the rear face of the first leg 38 intermediate the sideedges thereof and adjacent the upper end thereof is a key 41corresponding to the shape of the keyhole slot 34 in the mounting plate28.

To mount the striker plate 30, it is placed in the position shown inFigure 2, wherein the key 41 fits within the keyhole slot 34. Then, theplate 30 is swung downwardly to a position wherein the leg 38 lies fiatagainst the mounting plate 28 and is disposed vertically. When in thisposition, the second leg 40 of the striker plate extends perpendicularlyfrom the plane of the upper sash l6 and engages the top member 20 of thelower sash when the lower sash is opened, thereby limiting the openingmovement of the lower sash.

In order to stiffen and strengthen the striker plate 30 againstbuckling, the first leg 38 depends below the bottom of the second leg40, forming a downwardly depending lip 42 below the second leg 40.

Top member 20 of the lower sash 18 is formed with an upwardly openingnotch or groove 44 at the rear edge thereof within which the lip 42seats to prevent buckling of the plate should an attempt be made toraise the lower sash beyond the limit fixed by its abutment with theguard attachment 26.

When it is not desired to use the guard attachment, it is only necessaryto twist the striker plate 30 to align the key 41 with the keyhole slot34, as shown in Figure 2, and remove the striker plate from the mountingplate 28. When the striker plate 30 is so removed, the lower sash 18 maybe moved to its full open position.

From the foregoing, the construction and operation of the device will bereadily understood and further explanation is believed to beunnecessary. However, since numerous modifications and changes willreadily occur to those skilled in the art, it is not desired to limitthe invention to the exact construction shown and described, andaccordingly, all suitable modifications and equivalents may be resortedto, falling within the scope of the appended claim.

What is claimed as new is as follows:

A device for limiting opening of windows comprising an attaching plateattachable in vertical position to a vertically slidable upper windowsash and provided with a horizontal slot therein, a striker plate havingright angled legs, an elongated key on one of said legs insertablethrough said slot to position the same behind said attaching plate, saidstriker plate being rotatable on said key when inserted about an axistransverse to said attaching plate to position its other leg across alower vertically slidable window sash and to rotate said key crosswiseof said slot to secure said plates together.

References Cited in the file of this patent UNITED STATES PATENTS1,129,572 Jephsen Feb. 23, 1915

